Picture frame



FIG. 1 is an isometric view of a picture frame showing a new design of an embodiment taken from the front, the rear being flat and unadorned; and,

FIG. 2 is a right side elevational view of the embodiment, the left side views being identical thereto.

The patterns (of stars and moons) shown in stippled lines are for the purposes of illustrating the application of graphics or a composite image to the picture frame, but do not form part of the claimed design. 

The ornamental design for a picture frame, as shown and described. 